Appendix A. Ionic composition of sprays used in the acidification experiment.
TABLE A1. R – water with ionic composition mimicking rain water in the area, prepared following the data of Malmer and Nilgård (1980). F+R – a mixture (1:20) of rich fen soil solution collected in the field and the rain water, prepared as described above. Necessary concentrations of ions in the rain water were obtained by dissolving 18.9 μg/L MnSO4*4H2O, 100 μg/L ZnSO4*7 H2O, 389μg/L FeSO4*7 H2O, 0.422 μl/L H2SO4, 0.520 μl/L HNO3, 177 μg/L CaCl2, 34.6 μg/L K2HP O4, 284.2 μg/L Na2SO4, 194.1 μg/L MgSO4*6 H2O, 14.9 μg/L KCl, 87.1 μg/L K2SO4, and 343.5 μg/L (NH4) 2SO4. Ionic composition of the F+R mixture was measured by atomic absorption spectrometry method. Concentrations of mineral elements are expressed as μMol/L.
|
pH |
Na+ |
K+ |
Mg2+ |
Ca2+ |
Mn2+ |
Fe2+ |
Zn2+ |
NH4+ |
NO3- |
Cl- |
(SO4)2- |
(PO4)3- |
R |
5.1 |
4 |
1.6 |
0.85 |
1.6 |
0.15 |
1.4 |
0.35 |
8.5 |
7.8 |
3.7 |
15.3 |
0.2 |
F+R |
6.7 |
5 |
72.5 |
44 |
93 |
3.8 |
0.35 |
0.7 |
|
|
|
|
|
LITERATURE CITED
Malmer, N., and M. Nilgård. 1980. Supply and transport of mineral nutrients in a sub-arctic mire. In M. Sonesson, editor. Ecology of a Subarctic Mire. Ecological Bulletin 30:63–95.